I took one lesson last year. He spent most of the time showing me safety play.
As far as my stroke. I practice hitting a ball the length of the table, being sure it comes back to the tip of my cue. I can do it at different speeds 95% of the time. I also practice making stop shots and draw shots and trying to figure out how the cue ball moves.
This 'instructor' is a hack and he wasted your time.
If you are an APA3 and have only been playing pool for a year, an instructor should be teaching you stance, bridge, stroke and preshot routine.
Game strategy, such as safety play, is well past your needs and abilities.
See when Scott Lee is coming through your area.
As for your stroke practice, much better to set up shots and consistently be able to stop the ball (straight in shots) at any distance. Being able to hit a stop shot and know that the cue isn't rolling at contact will teach an observant player a lot about how balls react to each other.
While I suggest drills earlier, I also suggest balance. Drills should take a ton of concentration and they should frustrate...that is the point. Nobody was ever proud of anything they learned if it came easy. We call them 'hurdles' for a reason, they are something you have to get past...make three balls, good, now make four. Run a rack of eight, run a rack of nine.
Frustration is good. Letting that frustration turn into anger or feelings of inadequacy is bad. You are going to get better, then you are going to find out how much you need to learn. You'll probably have a huge setback at some point--I sure as hell did and I rebuilt my game from the ground (literally--started with my feet placement) to my head and every point in between. I changed my stance, my stroke, my head placement, my bridge and my strategy after playing for a decade and it was worth it--even if it didn't seem like if for three months.
As a final thought, set out your goals, make them realistic and aligned with how much time you are willing to put in. Break your ultimate goal into smaller goals and track your progress.